Lifting device



FIG. 1 is a perspective view of a lifting device showing my new design;

FIG. 2 is a retracted front elevation view thereof;

FIG. 3 is a front expanded elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a back expanded elevation view thereof;

FIG. 7 is a bottom view thereof; and

FIG. 8 is a right side elevation view thereof. 

The ornamental design for a lifting device, as shown and described. 